Question

why do solid expand on heating

Answer 1

solid is expand on heating, why because kinetic energy is Increases ,by increase of KE molecules move randomly to move they want space, so solid expands on heating

Answer 2

Answer:

the particles of solid vibrate about their mean position . When we heat the solid , the particles start vibrating at a larger amplitude . This results in the particles moving apart from the neighbouring particles. This causes an increase in volume of solid and it expands.